code: def test_f0_metrics_resamples_f0_hz_predictions_to_expected_length(
      self,
  ):
      f0_metrics = ddsp_metrics.F0Metrics(
          self.sample_rate, self.frame_rate
      )
      expected_len = self.frame_rate * self.audio_len_sec
      shorter_len = int(expected_len * 0.8)
  
      # Batch 1: known sin features vs. batch of shorter f0_hz at different f0
      f0_metrics.update_state(
          self.batch_of_sin_feats,
          3 * self.batch_of_sin_feats["f0_hz"][:, :shorter_len],
      )
      self.assertGreater(f0_metrics.metrics["f0_dist"].result(), 0)
  
      f0_metrics.flush(step=1)
  
imports: from unittest import mock
  from absl.testing import parameterized
  import ddsp
  from ddsp.test_util import gen_np_batched_sinusoids
  from ddsp.test_util import gen_np_sinusoid
  import ddsp.training.metrics
  import numpy
  import tensorflow.compat.v2
label_desc: Use image node_id 7 for calling the MetricsObjectsTest obj's underlying member method code with example usage: obj.test_f0_metrics_resamples_f0_hz_predictions_to_expected_length() without return types